Saw-swage



June 20, 1933. D. E. GOMMEL SAW SWAGE Filed Aug. 13, 1928 2 Sheets-Sheet 1 Ghana;

June 20, 1933.

D. E. GOMMEL SAW SWAGE Filed Aug. 15, 1928 2 Sheets-Sheet 2 Patented June 20 1933 uarrsos rA'res PATENT oFFice DEWEY E. GOMMEL, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO E. C. ATKINS AND COMPANY, INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA SAW-S'WAGE Application filed August 13, 1928. Serial No. 299,414.

My invention relates to improvements in swages. More particularly, it is anob ect of the invention to construct a swage which may be readily adapted for use with either band saws, gang saws, circular saws, or cylindriof models of swages may take care of a. larger range of work than is possible with known swages. V r

Further objects and advantages will become apparent as the description proceeds.

Referring to the accompanying drawings, which are made apart hereof and on which similar reference characters indicate similar parts. r r

Figure 1 is a side elevation of my improved saw swage,

Figure 2 is a detail view of the die and anvil,- v I V Figure 3 is a detail showing means for securing the swage lever on the die,

Figure 1 is a cross section showing the die and its roller bearing mounting 1 Figure 5'is aview in detail showing means 30 for clamping the arm on the securing screw,

Figure 6 shows the swaging die shaft.

Figure 7 is a section on line 7-7 of Fig. 1,

Figure 8 is a plan View of a modified form of swaging fixture for use with a cylindrical saw,

mg the front rest-for a cylindrical saw,

Figure 10, a detail of the saw. engaging rest Figure 11 is a modified form of the device,

Figure 9 1s a plan-view of a detailshowa arm 10. The lower end of the member 11 is also slotted to fit over a saw 15. Secured between the depending arms of the slot is a plate/l6 which is, adapted to rest upon the tips of the saw points in operation. This plate may be secured by rivets or bolts 16. The opposite end of the frame 9 has a simllarmember 17 to which is secured a plate 18 whlch rests uponthe tips of the saw points. A'bolt 19 engaging the slotted portion 20 of the member 17 holds this latter member in adjustable position. The frame 9 has an arcuate portion 21 which fits around a cylindrical body 22. This cylindrical body carries the swaging die 23 and the anvil 24. The

cylindrical body is secured to the arcuate portion of the frame by means of a bolt 22. This bolt passes through an elongated slot 21 in the arcuateportion 21 of the frame. This permits a relative rotation between the cylinder22 and the frame 9. The cylinder 22 is rotated to'a predetermined position and secured there by means of the nut 22 which frictionally engages the periphery of the arcuate portion 21 of the frame. The anvil 24 is held in position against a tooth of the saw by an adjustable screw 25 which is screwthreaded into cylindrical member 22. An elongated arcuate slot 26 in the arcuate portion 21 permits rotation of the cylinder 22 with respect to the frame 9, to take care of the adjustment above mentioned. The anvil is also secured by means of screws 25 which pass axially through the ends of the cylindrical member 22 and engage opposite sides of the anvil. The die is mounted in a bore in the cylindrical member 22 which bore is eccentric with respect to the cylinder 22. This die is preferably mounted in roller bearings mounted in the cylinder 22. These bearings comprise end plates 54 which carry the trunnions 55 of roller bearings 56. The plates 54 are held by pins 57. A sleeve 58 surrounds the rollers and is held between the end plates 54. This collar is tightly pressed into a bore in the cylinder 22.

The swaging die proper is formed of a cylindrical die shaft 27 having the die portion 7 23. The outer ends of the shaft 27 are flat toned on two sides to receive an operating The screw 30 has a sloping surface 32 extending from the other end which surface engages the, fiat surface on the end of the die shaft 27. By means of the nut 31 the screw is advanced sothat the sloping surface engages the flat end of the die shaft so as to hold the lever 27 rigidly on the shaft. The end of the lever 29 has a flanged portion 29 which engaged by a lug 27, and this lug is held by a screw to the end of the cylinder 22. This holds the die from moving axially out of the cylinder.' The die portion of the shaft 27 has four swaging faces or edges, all four of said faces are of similar shape on the same die so'that in use the same result is obtained by onefaceas by the other. The four facesor edges however, may be used interchange ably so that the life of the die is thus prolonged. As one'face is releasedlthew-die" is adjusted to bring another face into operative position. When'thiswface becomes worn so that it is no longer satisfactory the die is ad justed to bring another face in operative position. By this means a very long'life die is provided. Each of these edges has a constant rise from a point33, called the valley up to the highest point of the die; By means of this construction the die Works the same throughout the whole period of its rotation during operation. This makes the die work i much easier and any part of the die can be arsed for swaging as the whole surface does the same work through its entire length. In this respect it differs from old swaging dies, in which the highestpoint did all the Work. Furthermore, with this die, the surface at 35 .ias ground ofl a relief of about 1/100 of an inch. This enables the swage towork more freely than did the old dies, which cause a drag resulting in injury to the face of the tool. The die shaft 27 as shown hasbothof Ets ends flattened. This allows the die to be used in any one of four positions,that is,

two operating faces maybe used in one position and by reversing the shaft two additionalcalm surfaces are brought to operative position. This enables the operator to care for four different swage adjustments by means of a single die.

It should be observed furthermore that with this die, if it becomes necessary to'use the die with a smaller diameter such a'die can be ground to the size desired or suitable for the particular work to be performed, that is, of a size adapted for use in swaging a saw with gullets between the teeth of any size.

The cam surfaces on the die path are ground to correspond-in shape one with the other regardless of the size. In other words the'diameter of thedie may be reduced or enlarged .lbut the contour of the cam face or operating edge remains the same. This will not affect the rise of the die which remains the same throughout.

The cylindrical body 22 is slotted at 36 to fit over the blade of the saw 15. A screw 37 on one side of the slot is screw threaded against the flat side of the saw and a screw 38 on the other side operated by a handle 39 secures the cylindrical body 22 upon the saw. The screw 37 may be held in adjusted position by means of'a set screw 41. The handle 39 is secured upon the end of the screw 38 by means of a screw and nut 40 similar to those which'hold the die handle 29 upon the die shaft. The end of the screw 38 however has a number of-flat sides which allow the handle 39 to'be secured at any one of a numberof desired radial positions. This enables the operator to have the handle 39 set at a convenient position after the screw 38 has been tightened against the side of the saw. A bracket 41 extending up from one side of the arcuate portion 21 has an arcuate slot 42 therein. A bolt 43 is adjustably secured in the slot by means of a nut 43. The bolt 43' serves as an abutment to limit movementof the operating lever 29 in its rear position. An arm 44 is adjustably secured 'by means of a nut 46 on one arm of the frame 9. This arm 44 has an outstanding lug 0r crank like portion 45 which serves as an abutment for the operating handle 29 in its forward position.

Thestructure shown in full lines in Fig. 1 is designedfor use on a band saw. When it is desired to use the swage upon a circular saw the arm 11 is moved to the dotted line position shown at 11', so that the plate 16 will engage the points of two adjacent saw teeth. The remainder of the die remains the same both in structure and in operation.

When it is desired to use the swage in connection with a bench attachment an attaching arm 12,'shown in Fig. 11, is secured upon the end'of the arm 10. A slotted block is secured by means of a clamping screw 81 on the upstanding flange of the bench attachment 14. A stub shaft 13 is secured by clamping bolt 82 in said block and the attaching arm 12" is pivoted and adapted to freely swing or float thereon. By manipulating the set screw'81 block 80 may be set upon the attachment 14 to bring the swage inproper position relative to the work as indicated in Figure 11.

When it is desiredto use the swage on a cylindrical saw, the member 11 is removed and a block 47 .is secured thereon by means of a bolt 48, as shown in Big. 9. -The block 47 hasv a vertical bolt .49 passing therethrough, which enters a slot in the arm of a member 50. One endof this member 50 has a pair of depending lugs 51 and 52, which fit over the cylindrical surface of the saw. A flat portion 53 Lhasa hardened plate secured thereon by means of rivets or bolts,

and this plate rests upon the tips of the saw teeth. By loosening the bolt 49 the member 50 may be adjusted and moved to conform to the circular curvature of cylinders of various sizes.

In operation the cylindrical member 22 is placed so that the slot 36 fits over the saw blade 15. The belt 87 is then tightened and held in tightened position by means of the set screw 41. For saws of uniform thickness the bolt or screw 37 will not be loosened again. The screw 38 is then rotated by means of the handle 39 until its inner end engages the flat surface of the saw 15 and grips it firmly. Block 22 is rotated in saddle 21 until anvil 24 rests solidly on the back of the saw tooth, it is then locked in position by the screws. This can also be accomplished by moving rest 11 up or down by means of the slot 12. This makes the swage very easy to set up. The lever 29 is then shoved forward to rotate the swaging die 23 to move the cam edge against the point 54 of the saw to grip this point between the working edge of the die and the Working end of the anvil 2%. The powerful leverage afforded by the arm 29 produces the necessary swaging action upon the saw tooth. When it is desired to use the swage on acircular saw, the extended arm 12 may be secured to the slotted arm 10. The other end of this arm is adjustably secured to a member 14: secured to a bench or table, to hold the device in position during operation. With the form shown in dotted lines in Fig. 1, the arm 11 is moved to the dotted line position shown at 11 in Fig. 1, in which position the plate 16 adapts itself to the position of the tips of the saw point. As shown in Figs, 8, 9 and 10, the member 11 may be removed and the arm 50 secured to the arm 10 to'allow the swage to operate on cylindrical saws.

In order to use the swage on gang saws block 22 is rotated around until anvil 24 rests on the back of the saw tooth. The saddle 21 has range enough in slots 21 and 26 to accomplish this. The die for each of the different types of saws is the same and the swaging operation is carried on in the same manner. The polygonal shape of the end of the bolt 38 allows the arm 39 to be set at an angle most convenient to the operator during operation of the swaging arm 29.

" It will readily be seentherefore that my swaging device has a range of adaptability 1 greater than swages now known, which enables an operator to do morework wlth less effort in a given length of tune and wlth less I inech anical equipment than is necessary with older forms of swages.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

A device for swaging cylindrical saws comprising a frame having a swaging block mounted therein, a die mounted in the block, means on the block for fastening it to a saw, the said frame having an arm having a longitudinal slot therein, a laterally extending block on said arm, a bracket having a slotted arm for securing it to the block to permit adjustment of the bracket toward and from the arm, said bracket having a pair of depending lugs for straddling the edge of a saw, the block and the slotted bracket permitting adjustment of the bracket to saws of different diameters, substantially as set forth.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 26th day of July, A. D. nineteen hundred and twenty-eight.

DEWEY E. GOMMEL. 

